106 THRASYG02US. 



4. Thrasygceus undatus. 



T. oblongo-ovatus, latus, subdepressus, subtiliter pubescens, rufo- 

 ferrugineus ; capite subelongato, granulate; thorace transverso, 

 ad apicem subconstricto, ad basin et ad angulos anticos depresso ; 

 elytris latis, punctato-striatis, vittis duabus transverse notatis in- 

 constantibus undatis flavis, hac ante medium, ilia ad basin ; an- 

 tennis robustis, ad apicem dilatatis, art. 16 fusco suffusis, 79 

 piceis, 10 et 11 testaceis ; pedibus flavis. 



Long. corp. 2f lin., lat. 1^ lin. 



Oblong-ovate, broad, subdepressed, very finely pubescent, of a 

 dark fawn or ferrugineous colour. Head transverse, subelongated ; 

 above the labrum is a transverse triangular plane, extending up- 

 wards nearly to the base of the antennae : above the antennae are two 

 broad and obsolete tubercles, extending to the inner margin of the 

 eyes ; above them is a slight transverse depression : the surface gra- 

 nulated, of a dark brown colour, the upper and inner margins of 

 the eyes, and a small circular spot medially at the base, being of a 

 paler hue : eyes large, prominent, situated at the base of the head, 

 extending laterally nearly as far as the angles of the thorax. Tho- 

 rax transverse, rectangular (slightly contracted towards the apex), 

 rectilinear ; the anterior angles depressed ; the sides marginate ; at 

 the base is a broad transverse shallow depression, which is most 

 distinctly apparent near the basal angles ; in front, also, are three 

 depressions, one medial longitudinal, distinct and deep, the others 

 lateral and more obsolete ; the surface very finely punctate through- 

 out; the colour a dark brown. Scutellum large, triangular, impunc- 

 tate. Elytra much broader than the thorax, depressed, punctate- 

 striate, the punctures in the striae being almost obsolete, and clothed 

 throughout (when viewed under a high power) with a very fine pu- 

 bescence ; the surface of a deep-brown colour, which is broken ante- 

 medially and near the base by two irregularly-formed transverse 

 markings of a pale flavous colour : the one which is antemedial is 

 obliquely transverse, extending in the direction of the scutellum ; it 

 consists of several (four to six) short longitudinal lines, connected 

 one with the other anteriorly; the postmedial transverse marking is 

 also very irregular in form, and does not extend to the suture : at 

 the margin of the shoulders, also, is an indication of this same pale 

 flavous colour. Antennae robust, dilated towards the apex; the 

 joints one to six flavous, suffused with fuscous ; seven, eight and nine 

 piceous, ten and eleven testaceous. Legs flavous throughout, the 

 apex of the femora and the tibiae and tarsi being suffused with 

 piceous. 



Venezuela. In the collection of M. Chevrolet. 



